Patented inventions of the C.S.I.R.
Council of Scitific and Industrial Research
Patented inventions of the C.S.I.R. - New Delhi CSIR - 555 p.
R083:608.3(CSIR) J1.1
Patented inventions of the C.S.I.R. - New Delhi CSIR - 555 p.
R083:608.3(CSIR) J1.1